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About Product
Mohamed Imran Lakhi
This content has been written and checked for quality and accuracy by
Mohamed Imran Lakhi Content Administrator Updated on: 12/11/2021 Next review: 12/05/2022

Buy Cetirizine Online

Cetirizine is an antihistamine medication used to treat the symptoms of allergies. It can be used to treat dust and pet allergies, and hayfever. It can also be used to treat certain food allergies and reactions to stings and insect bites.

Cetirizine relieves allergy symptoms such as sneezing, blocked nose and itchy and watery eyes.

You can buy Cetirizine from our UK registered pharmacy in 10mg tablets. Our safe and secure service makes it simple and quick to get the hayfever treatment you need delivered directly to your door.

What is HayFever?

Hayfever is an allergy caused by pollen. Symptoms include nasal congestion, runny nose, itchy nose, itchy, swollen eyes, and sneezing.

Hayfever occurs when the immune system reacts to a harmless substance present in the air (such as dust or pollen) and begins to produce antibodies. These antibodies release chemicals (histamine) into the bloodstream. Histamine is a naturally occurring chemical within the body which is released in response to an allergic reaction. This leads to the development of hayfever symptoms.

It’s important to treat hayfever as the condition is not only uncomfortable, it can also interfere with your day-to-day life. Hayfever can often lead to days off work (or school) and may prevent you from enjoying your favourite activities, particularly outdoor activities. Hayfever can also exacerbate the symptoms of asthma and can cause coughing and wheezing in those who are susceptible. Hayfever can also cause sinus congestion and can lead to sinusitis (infection of the sinuses) if left untreated.

How Does Ceterizine Work?

During an allergic reaction, a chemical called histamine is released.

Histamines are part of the bodies natural defence system. Their purpose is to remove allergens out of the body.

Cetirizine works by blocking histamine receptors.

Without the ability for histamine to bind to these receptors, the effects of histamine in the body are reduced.

How long does Cetirizine take to work?

Cetirizine starts working within 20 minutes of taking it. Most people notice an improvement in their symptoms within an hour of taking Cetirizine.

How Do I Take Cetirizine?

The recommended dose of Cetirizine is 10 mg taken once daily.

Swallow Cetirizine tablets whole with a glass of water.

Do not crush or chew Cetirizine tablets.

Cetirizine tablets can be taken with or without food.

Cetirizine Side Effects and Cautions

Before you begin taking Cetirizine, you must read the patient information leaflet enclosed with your treatment.

You can read the patient information leaflet for Cetirizine online.

If you have any doubts or concerns about any of the information presented in the patient information leaflet, speak to your doctor or a pharmacist. You can also discuss any concerns you may have with one of our online prescribers.


Do not take Cetirizine if you are allergic to any of the ingredients in this medicine.

If you experience any signs or symptoms of an allergic reaction after taking Cetirizine, stop taking the medicine immediately. Go straight to your nearest accident and emergency department. Remember to take the packaging and any remaining medicine with you, so that doctors treating know exactly what you have taken.

Cetirizine contains lactose. Speak to your doctor before taking Cetirizine if you have been told that you are sensitive to some sugars.

Who should not take Cetirizine?

Cetirizine is not suitable for everyone.

If you are unsure whether Cetirizine is safe for you, speak to your doctor or ask a pharmacist.

Do not take Cetirizine without speaking to your doctor first if you:

  • are pregnant or breastfeeding
  • have kidney disease

Side effects of Cetirizine

As with any medication, Cetirizine can cause side effects in some people, although not everybody will experience these.

Before taking Cetirizine, it's important to familiarise yourself with the patient information leaflet which comes enclosed with your medicine. Always retain this leaflet to refer back to.

Common side effects (may affect up to 1 in 10 people):

  • Diarrhoea
  • Dizziness
  • Dry mouth
  • Headache
  • Nausea
  • Sleepiness
  • Sore throat
  • Tiredness

Less common side effects (may affect up to 1 in 100 people):

  • Abdominal pain
  • Feeling agitated
  • Feeling weak
  • Itching
  • Malaise (feeling generally unwell)
  • Paraesthesia (abnormal feelings of the skin)
  • Rash
  • Tingling in the hands and feet

Rare side effects (may affect up to 1 in 1000 people):

  • Abnormal liver functions
  • Aggression
  • Confusion
  • Convulsions
  • Depression
  • Hallucination
  • Insomnia
  • Oedema (swelling due to water retention)
  • Tachycardia (fast heartbeat)
  • Urticaria (swelling, redness and itching of the skin)
  • Weight increase

This is not an exhaustive list of side effects. For more information regarding the safety of this medicine, we encourage you to read the patient information leaflet (PIL) which is enclosed with your medicine.

Reporting side effects

If you experience any side effects as a result of this medicine, speak to your doctor or a pharmacist for assistance.

It is unlikely that other drugs will interact with Cetirizine, but it is important to make us aware of any medication that you are currently taking. This includes prescription medication, medication bought over-the-counter and health supplements. This is to ensure that this medicine is safe for you to take.

Other safety information

Always read the patient information enclosed with your medicine before you start taking Cetirizine.

Inform us of any medicines you are taking, including those prescribed by your doctor, or bought over the counter, as well as health and herbal supplements.

Do not take Cetirizine past the expiry date printed on the packaging.

Never throw away Cetirizine via household or water waste. Take any unwanted or expired medicines to your local pharmacy and ask them to dispose of them for you. These measures can help to protect the environment.

Always store medicine out of the sight and reach of children and pets.

Never share your medicine with anyone else, even if they are experiencing the same symptoms as you.

Frequently Asked Questions

What should I do if I forget to take Cetirizine when I should?

If you forget to take Cetirizine, you can take it as soon as you remember but make sure you wait at least 24 hours before you take the next tablet. Do not take a double dose to make up for forgetting a dose.

What should I do if I take too much Cetirizine?

Taking too much Cetirizine can increase the risk of potentially dangerous side effects. If you accidentally take too many and are not sure what to do, speak to your doctor or a pharmacist for advice.

How will alcohol affect Cetirizine and/or Hayfever?

Alcohol does not interact with the medicine, but it should still be avoided as it may cause side effects such as nausea, sleepiness or dizziness. It may also worsen the symptoms of hayfever.

Will Cetirizine impact my ability to drive or operate machinery?

Cetirizine should not affect a person's ability to drive or operate machinery. If you feel dizzy after taking Cetirizine, you should avoid driving or operating machinery until you feel well enough to do so.

Can Cetirizine make you drowsy?

Cetirizine is a non-sedating antihistamine and should not make you drowsy. If you begin to feel drowsy after taking Cetirizine, speak to your doctor as soon as possible.

Can I take Cetirizine with other hayfever treatments?

Speak to your doctor before taking Cetirizine alongside any other hayfever treatments. Inform our online prescribers of all other medicines you are taking, so that they can determine whether it's safe for you.

Can I buy Cetirizine over the counter?

Yes, you can buy Cetirizine over the counter. However, we offer a service where you can order your medicine online and have it delivered to your door.

If you cannot get to a chemist to pick up Cetirizine, you can buy Cetirizine from our online UK pharmacy and have it delivered to your door.

Treatment information

  • Product Name: Cetirizine
  • Active Ingredient(s): Cetirizine hydrochloride
  • Administration: Oral
  • Presentation: Tablet
  • Available Strength: 10 mg
  • Exemption: Pharmacy
  • Application: Men and women over 18+
  • Dosage: Take one tablet daily
  • Description: Cetirizine is an antihistamine used to prevent the symptoms of hayfever
  • Drug Class: Antihistamine
  • Alcohol Consumption: Avoid or limit alcohol consumption
  • When Pregnant: Do not take Cetirizine
  • When Breastfeeding: Do not take Cetirizine
Click here to view the Cetirizine - Patient Information Leaflet

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